Spray vs Air Injector for Aeration

Discussion in 'Water Softener Forum, problems, installation and r' started by Matt Helm, Oct 4, 2011.

  1. Matt Helm

    Matt Helm Non-pro Polymath

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    I am putting together an aeration tank. I would like to avoid using a venturi air injector. So, I am planning on filling the tank from the top with agricultural spray nozzles (sized appropriately for GPM and PSI).

    Thoughts?
     
  2. LLigetfa

    LLigetfa DIYer, not in the trades

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    How do you intend to put the air into the tank? How will you bleed air off?
     
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  4. Matt Helm

    Matt Helm Non-pro Polymath

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    Filtered vent to the outside.

    As the tank is drawn down (by a jet pump that is charging the pressure tank), fresh air is drawn into the aeration tank. During the next fill cycle, air is expelled.

    I am hoping to avoid a powered vent, but it isn't a big deal if I can't.
     
  5. LLigetfa

    LLigetfa DIYer, not in the trades

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    Ah, so... non-pressurized hold tank. Is the aeration to remove smell or to precipitate iron? If for iron, then your jet pump will clog up with iron and need frequent cleaning.
     
  6. Matt Helm

    Matt Helm Non-pro Polymath

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    Here is a very simplified overview. It does not show the air vent, filtration, or control circuitry.

    I threw this drawing together for a vendor that I was thinking of getting some parts from.

    Simple Aerator.jpg
     
  7. Matt Helm

    Matt Helm Non-pro Polymath

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    For hydrogen sulfide and some other noxious gas. It may be that elemental sulfur will also be an issue with the pump. That is beyond my knowledge.


    Edited to add: I am planning on multiple stages of filtration between the jet pump and the pressure tank. Coarser for elemental sulfur produced by the aeration and finer for some colloidal clay issues that I am still playing with.
     
    Last edited: Oct 4, 2011
  8. rjh2o

    rjh2o Member

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    The aeration/settling tank and any filtration needs to go AFTER the pressure tank. You can the use a Multi-Media backwashing filter to remove particulate matter. The way you have this designed at this point can potentially cause issues with the jet pump operation and pressure switch.
    RJ
     
  9. Matt Helm

    Matt Helm Non-pro Polymath

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    How so? From the amount of oxidized iron?
     
  10. Gary Slusser

    Gary Slusser That's all folks!

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    There may be rust buildup sufficient to block the jet in the jet pump. Cure... install a safety float controlled submersible pump in the aerator tank that comes on/off with the pressure switch on the pressure tank.
     
  11. Matt Helm

    Matt Helm Non-pro Polymath

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    I like it (I was going to have a couple float switches anyway).

    Ok to mount a submersible horizontally? Or, is that bad for the bearings/bushings/shaft?
     
  12. Gary Slusser

    Gary Slusser That's all folks!

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    You can lay it on its side but they aren't made to do that so, since you'll have maybe 3-5 feet of useable water in the tank, I'd hang a 1/2hp 10-13gpm 240v a couple inches off the bottom so it doesn't stir up 'dirt' when it runs.
     
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